The military said that in response the IDF "targeted Iranian targets in Syria". It said the mission deep inside Syrian territory was successfully completed.

The military said that in response the IDF "targeted Iranian targets in Syria". It said the mission deep inside Syrian territory was successfully completed.

The two pilots ejected and were later taken to hospital. Their condition was not immediately known.

The two pilots ejected and were later taken to hospital. One of them was "severely injured as a result of an emergency evacuation", the IDF said.

It was not clear whether the F-16 jet was hit by anti-aircraft fire or went down for other reasons.

Red alert sirens sounded in areas of northern Israel and the Israeli-occupied Golan Heights due to Syrian anti-aircraft fire.

Red alert sirens sounded in areas of northern Israel and the Israeli-occupied Golan Heights due to Syrian anti-aircraft fire.

Residents reported hearing a number of explosions and heavy aerial activity in the area near Israel's borders with Jordan and Syria.

Residents reported hearing a number of explosions and heavy aerial activity in the area near Israel's borders with Jordan and Syria.

Syrian state media quoted a military source as saying that the country's air defences opened fire in response to an Israeli act of "aggression" against a military base on Saturday, hitting "more than one plane".

Syrian state media quoted a military source as saying that the country's air defences opened fire in response to an Israeli act of "aggression" against a military base on Saturday, hitting "more than one plane".

Israel has said only one of its planes was hit.

What is the Iranian presence in Syria?

What is the Iranian presence in Syria?

Iran - together with Russia - is a key supporter of Syrian President Bashar al-Assad, whose troops have been fighting rebel groups since 2011.

Iran - Israel's arch-enemy - is a key supporter of Syrian President Bashar al-Assad, whose troops have been fighting rebel groups since 2011.

Last November, a Western intelligence source told the BBC that Tehran was establishing a permanent military base inside Syria.

Tehran has sent military advisers, volunteer militias and, reportedly, hundreds of fighters from its Quds Force, the overseas arm of the Iranian Revolutionary Guards Corps (IRGC).

Israeli Prime Minister Benjamin Netanyahu has warned that "Israel will not let that happen".

It is also believed to have supplied thousands of tonnes of weaponry and munitions to help President Assad's forces and the pro-Iranian Lebanese Hezbollah movement, which is fighting on Syria's side.

Iran has faced accusations that it is seeking to establish not just an arc of influence but a logistical land supply line from Iran through to the Shia Hezbollah movement in Lebanon.

Israel has accused Iran of seeking to establish military bases and missile factories in Syria, something Israel says it will not allow to happen.

Tehran has faced accusations that it is seeking to establish not just an arc of influence but a logistical land supply line from Iran through to Hezbollah in Lebanon.